Soil Additives

The original Hydroton brand expanded clay is a unique, lightweight expanded clay aggregate made in Germany. This natural clay is mined, formed into pellets, then kiln fired at high temperatures to cause the clay to expand into tough, lightweight balls...

GROW!T horticultural clay pebbles are made from 100% natural clay. They are clean, pH stable, and offer great aeration and drainage in hydroponics, especially in flood and drain, deep water culture, and drip feed systems. Due to their unique structure...

 Lightweight soil conditioner (white, powdery material) that loosens clay soil, reduces caking, and improves drainage and aeration. Can be used to start seeds, propagate cuttings, and store bulbs. Blend with peat moss and vermiculite for custom...